Products

3M™ Scotch-Weld™ Epoxy Adhesive 1838, Green, Part B/A

Brands: 3M™ Scotch-Weld™

Package Sizes: 950 mL Kit

Shelf Life: 24 months

Product Description

3M™ Scotch-Weld™ Epoxy Adhesive 1838 B/A Green is a two-part, controlled-flow structural adhesive that cures at room temperature and provides high shear strength with excellent environmental resistance. It is suitable for bonding many metals, wood, and some plastics and is recognized for meeting UL 94 HB standards​.


Key Features

  • Controlled-flow formulation for easy application.
  • Room temperature curing for convenience.
  • High shear strength for structural bonding applications.
  • Excellent environmental resistance.
  • Suitable for bonding metals, wood, and some plastics.
  • Recognized as meeting UL 94 HB​.

Recommended Applications

  • Metal bonding
  • Wood bonding
  • Plastic bonding
  • Industrial structural applications​

Typical Uncured Physical Properties

Attribute Value
Mix Ratio by Volume (B:A) 4:5
Mix Ratio by Weight (B:A) 1:1
Base Color White
Accelerator Color Green
Base Resin Modified Epoxy
Accelerator Resin Polyamide
Base Net Weight 11.0 – 11.6 lb/gal
Accelerator Net Weight 8.9 – 9.3 lb/gal
Base Viscosity (27°C / 80°F) 70,000 – 600,000 cP
Accelerator Viscosity (27°C / 80°F) 300,000 – 1,000,000 cP

Typical Mixed Physical Properties

Attribute Temperature Value
Open Time 60 min
Work Life (100g mixed) 23°C (73°F) 60 min
Time to Full Cure 23°C (73°F) 8 h

Typical Cured Characteristics

Attribute Test Method Temperature Value
Cured Color Green
Modulus 344,000 lb/in²
Shore D Hardness ASTM D2240 82

Typical Performance Characteristics

Test Substrate Test Method Temperature Value
T-Peel Adhesion Aluminum ASTM D1876 -55°C (-67°F) 2 lb/in width
T-Peel Adhesion Aluminum ASTM D1876 23°C (73°F) 4 lb/in width
T-Peel Adhesion Aluminum ASTM D1876 82°C (180°F) 4 lb/in width
Elongation at Break 2 – 3%
Tensile Strength at Break 4,290 lb/in²

Electrical and Thermal Properties

Attribute Test Method Condition Value
Glass Transition Temperature (Tg) Mid-Point 55°C (131°F)
Thermal Conductivity 0.169 (btu-ft)/(h-ft²-°F)
Dielectric Constant ASTM D150 1 KHz 6.06
Dissipation Factor ASTM D150 1 KHz 0.012
Volume Resistivity ASTM D257 1.5 x 10¹⁵ Ω-cm

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